HPC Energy Research files: 2, dataset size: 3.69 GB dataset id: d332818f-ef57-4189-ba1d-beea291886eb Heat gain and heat loss through windows are responsible for 25%–30% of residential heating and cooling energy use. The National Renewable Energy Laboratory is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, operated by the Alliance for Sustainable Energy… Wilson, E., et al. Single-Family Housing Stock. We considered an alternative scenario using a less efficient (and less expensive) SEER 14, HSPF 8.2 heat pump instead of the high-efficiency heat pump described here; however, that scenario provided lower economic potential in almost all regions (using both NPV>0 and SPP<5 thresholds). For this scenario, the existing electric baseboards are left in place to provide this supplemental heat. The National Renewable Energy Laboratory is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. Dennis Schroeder / NREL Energy efficient windows are an important consideration for both new and existing homes. This can be done from the outside, when it is convenient to remove a row of siding, or from the inside, which requires patching the holes made in the drywall or plaster. Energy Efficiency Potential in the U.S. National Renewable Energy Laboratory. NREL's Building Energy Science team focuses on early-stage research for building energy technologies, including advanced components and efficiency strategies for new buildings and retrofits. DHPs are a subset of mini-split heat pumps that use a wall-, floor-, or ceiling-mounted indoor unit to distribute heated and cooled air. SLOPE is developed and maintained by the National Renewable Energy Laboratory with funding and support from the U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy. The ResStock software can be used to analyze additional scenarios with different input assumptions, for additional technologies, or with additional input data for specific city, state, or utility territories. And it offers a custom map of spectral response at different locations. Rated energy factor is at inlet condition of 80 deg-F DB and 60% RH. Find a Job Explore our current job postings, which include research positions and other career opportunities in a variety of fields. Webmaster | Security & Privacy | Disclaimer | NREL Home. NREL is a national laboratory of the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy Operated by the Alliance for Sustainable Energy, LLC NREL/FS-5500-68842 • September 2017 × This is especially significant because electric furnaces are most prevalent in hot climates. Single-Family Housing Stock. of rigid extruded polystyrene foam to the interior side of foundation walls and rim joists in finished and unfinished basements. Supply and return duct surface area is also specified as a function of finished floor area and number of stories. Field studies using this "displacement" model suggest that DHPs typically cover 70%-80% of the heating load. A conservative value of 60% load displacement was used for this analysis. The original “legacy” data center had an annual energy consumption as high as 2,394,000 kWh and the overall utilization rate was less than 5%. The incorporation of variable-geometry components may hold the key to the elusive combination of increased energy capture and reduced structural costs. To learn more, read our blog. R-38 and R-60 options were also considered, but this R-49 option had the largest economic potential for this state. http://www.nrel.gov/docs/fy18osti/68670.pdf, Energy Efficiency Potential in the U.S. For this analysis, smart thermostats were modeled in a way analogous to programmable thermostats rather than attempting to model the specific control algorithms of one or more brands of smart thermostat and the associated occupant behavior patterns that would drive those control algorithms. Both the heat pump and reference replacement furnace capacities are sized in accordance with ANSI/ACCA Manuals J and S, except that the heat pump is sized based on the larger of the heating or cooling loads ("cold climate sizing") rather than the cooling load priority specified by Manual S. Heat pumps provide both heating and cooling, so this improvement provides cooling energy savings in addition to the heating energy savings. This arrangement allows a private entity to operate the lab on behalf of the federal government. The National Renewable Energy Laboratory is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. NREL: National Residential Efficiency Measures Database Home Page The National Residential Efficiency Measures Database is a publicly available, centralized resource of residential building retrofit measures and costs for the U.S. building industry. For this analysis, we assume that finished basements are heated and cooled, whereas unfinished basements are not directly heated or cooled. This foundation insulation improvement adds R-10 (2 in.) Photo by Dennis Schroeder/NREL. The heat pump is sized in accordance with ANSI/ACCA Manuals J and S, except that the heat pump is sized based on the larger of the heating or cooling loads ("cold climate sizing") rather than the cooling load priority specified by Manual S. Heat pumps provide both heating and cooling, so this improvement provides cooling energy savings in homes that already have cooling (room ACs or, less commonly, central AC). The unit used for this analysis has one of the highest efficiencies on the market - SEER 27 and HSPF 11.5. The modeled unit retains heat pump capacity at temperatures down to -15 °F, so it could also be classified as a "very cold climate heat pump.". NREL's mission is to develop clean energy and energy efficiency technologies and practices, advance related science and engineering, and provide knowledge and innovations to integrate energy … NREL is a national laboratory of the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy Operated by the Alliance for Sustainable Energy, LLC NREL/FS-5500-68816 • September 2017 × Based on the Building America HSP, homes with slab foundations have their ducts in the attic, homes with crawlspaces have their ducts in the crawlspaces, and homes with basements have their ducts in basements (conditioned or unconditioned). For this analysis, duct leakage is defined as the fraction of air handler fan flow rate that leaks out of pressurized supply ducts into unconditioned space, plus the fraction of fan flow rate that leaks into depressurized return ducts from unconditioned space, plus any leakage into or out of the air handler itself (all measured at 25 pascals pressure difference). More details on the methodology and input assumptions can be found in the NREL technical report, Energy Efficiency Potential in the U.S. Operated by the Alliance for Sustainable Energy, LLC By accessing the database, the user agrees to the terms and conditions of use. The Building Performance Institute, which sets quality assurance and technical standards for home performance professionals, recommends 10% as the maximum allowable duct leakage. The latest report presents an analysis on the potential impacts of widespread electrification on the U.S. electricity system—specifically, generation and transmission infrastructure investments, fuel use, system costs, and emissions. The Chicago Renewable Energy Challenge Program is a new initiative designed to accelerate the adoption of renewable energy across every neighborhood in Chicago. Retrofit Chicago - Learn more about Chicago's cross-sector effort to drive energy efficiency in municipal, commercial, and residential buildings across the city. This improvement brings the R-value of attic floor insulation up to R-49. Beginning in 2018, Com Ed will achieve 7.8% cumulative persisting annual electric savings. Homes with two or more stories are assumed to have 35% of their supply ducts within conditioned space. The National Renewable Energy Laboratory is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. NREL researchers developed a more efficient pathway for the generation of high-octane gasoline and jet fuel blendstocks from biomass. Thus it is common to supplement the "point-source" heat they provide with another heat source. 2017 for details). An alternative would be to retain the existing fuel-fired furnace for backup heat, but that scenario is not considered in this analysis. The National Renewable Energy Laboratory, located in Golden, Colorado, specializes in renewable energy and energy efficiency research and development. View webinar slides and recording from a Building America webinar presented on March 29. In 2017, Mayor Rahm Emanuel commited the City of Chicago to reaching 100% renewable energy for all electricity used in municipal buildings by 2025. The reference for these improvements is based on the current federal standard for furnaces of 82% for oil. Short, W., Packey, D., Holt, T. (1995) A Manual for the Economic Evaluation of Energy Efficiency and Renewable Energy Technologies. A study of 1,420 customers who installed one brand of smart thermostat found that the average nighttime setback was around 4 °F. In homes without existing air conditioning, total energy use could increase because of new AC usage. This inverter-driven heat pump is representative of ducted VSHPs currently on the market. The baseboards are also used during hours of the year when the heating load exceeds the DHP heating capacity. Get Involved. Single-Family Housing Stock. Introduction to Illinois Energy Efficiency Programs. Explore the links below to learn more about Chicago’s energy efficiency and renewable energy strategies and how you can help. NREL is a national laboratory of the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy Operated by the Alliance for Sustainable Energy, LLC NREL/FS-5500-68827 • September 2017 × Publications This improvement involves adding R-5 of rigid foam sheathing (e.g., 1-in. This improvement involves installing one or more high-efficiency ductless heat pumps (DHPs) in homes heated with electric baseboards. With this in mind, a 4 °F thermostat setback in heating mode and a 4 °F thermostat setup in cooling mode was used to model the smart thermostat in the subhourly building energy simulations. NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency & Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. Prepared by Eric Wilson and Noel Merket, NREL, and Erin Boyd, U.S. Department of Energy Office of Energy Policy and Systems Analysis. Erin BoydErin.Boyd@hq.doe.gov, NREL is a national laboratory of the U.S. Department of Energy Energy Efficiency Potential in the U.S. Department of Energy. The following resources provide more information about the data and allow you to download the data. NREL receives funding from Congress to be applied toward research and development projects. Blown-in attic insulation only applies to vented attics, not finished attics or cathedral ceilings. Single-Family Housing Stock, National Residential Efficiency Measures Database, https://basc.pnnl.gov/resource-guides/mini-split-ductless-heat-pumps, https://basc.pnnl.gov/resource-guides/continuous-rigid-insulation-sheathingsiding, https://basc.pnnl.gov/resource-guides/rigid-foam-insulation-existing-exterior-walls, https://basc.pnnl.gov/resource-guides/unvented-crawlspaces-and-conditioned-basements, https://basc.pnnl.gov/resource-guides/blown-insulation-existing-vented-attic, Btu per year gas, propane, and fuel oil savings. This improvement also includes adding R-8 insulation to any uninsulated ducts located in unconditioned space. Energy used by Washington single-family homes that can be saved through cost-effective improvements, Washington existing jobs in energy efficiency (2016)1, 1U.S. This inverter-driven heat pump is representative of ducted VSHPs currently on the market. Office of Energy Policy and Systems Analysis. This improvement involves installing a smart thermostat to control a home's central heating and/or cooling system. DHP installations typically have one or two indoor units per story rather than one or more baseboards, radiators, or supply duct registers in every room. of rigid extruded polystyrene foam to the interior side of foundation walls and rim joists in crawlspaces, and seals any crawlspace vents. NREL also performs research on photovolt This foundation insulation improvement adds R-10 (2 in.) NREL/TP-5500-68670, 2017. See resstock.nrel.gov for more information on using the software, and to learn how to partner with NREL or third-party consultants on additional analyses. This number ramps up every year through 2030, at the end of which Com Ed will achieve 21.5% cumulative persisting annual savings. Single-Family Housing Stock. The System Advisor Model (SAM) is a performance and financial model designed to estimate the cost of energy for grid-connected power projects based on installation and operating costs and system design in order to facilitate decision making for people involved in the renewable energy industry. Differences in approach or format of results may make comparisons to other efficiency potential analyses invalid. We advance the science and engineering of energy efficiency in buildings, schools, communities, and districts by optimizing energy systems and renewable technologies. If 'Auto' is entered, BEopt will use ENERGY STAR criteria to determine the energy factor. NREL’s indoor cultivators mimic conditions in large-scale outdoor algae farms, serving as an efficient testing platform for U.S. Department of Energy (DOE) National Laboratory researchers working to lower the cost of algal biofuels and bioproducts. Find NREL-developed data sets, maps, models, and tools used for the analysis of energy and energy efficiency technologies. Wind Energy Follow NREL NREL is a national laboratory of the U.S. Department of Energy , Office of Energy Efficiency and Renewable Energy , operated by the Alliance for Sustainable Energy, LLC . Researchers from the U.S. Department of Energy’s National Renewable Energy Laboratory (NREL) and the University of New South Wales achieved a new world-record efficiency for two-junction solar cells, creating a cell with two light-absorbing layers that converts 32.9% of sunlight into electricity. The National Renewable Energy Laboratory released a fifth volume in its Electrification Futures Study series. Blown-in fiberglass and blown-in cellulose insulation have similar costs and performance,so a distinction is not made for this analysis. U.S. Energy and Employment Report, Analysis approach and input assumptions are listed here. Illinois Utilities now have Accelerated Energy Efficiency Targets. Note that local codes may require more than R-10 when insulating foundation walls. NREL/FS-5500-68842 • September 2017. The Lawrence Berkeley National Laboratory's "Best Practices Guide for Residential HVAC Retrofits" also recommends a target duct leakage of less than 10% of air handler flow for duct sealing retrofits. These improvements were assumed to be triggered by failure of the existing furnace; if instead they were triggered by failure of a home's AC, the economics would be similar or better. It meets NEEP's "Cold Climate Air-Source Heat Pump Specification", so it can be considered a cold climate heat pump. SAM includes financial models for the following kinds of projects: Residential building (retail electricity rates) For full details, see Other studies have used values ranging from 60%-80% displacement of the heating load. The reference for this improvement is installation of an electric furnace identical to the existing one (100% AFUE). Thus they are applicable to homes without existing duct systems. It meets NEEP's "Cold Climate Air-Source Heat Pump Specification," so it can be considered a cold climate heat pump (CCHP). DE-AC36-08GO28308 NREL Job Task Analysis: Energy Auditor Thus, 10% was used as the post-retrofit duct leakage value for this analysis. This improvement could alternatively be triggered by failure of a home's AC, in which case the economics would be similar or better. The analysis results presented here used the following approach and input assumptions. National Institute of Advanced Industrial Science and Technology In practice, the amount of displacement is highly dependent on occupant behavior and control strategy (set point of supplement heat relative to DHP, doors left open or closed, insulating value of the thermal enclosure, comfort preferences, etc.). When migrating this data center into the RSF, NREL’s engineers prioritized energy efficiency, identifying opportunities to upgrade the data center and make it suitable for a net-zero energy building. NREL/TP-5500-68670, 2017. http://www.nrel.gov/docs/fy18osti/68670.pdf, This work was supported by the U.S. Department of Energy Building Technologies Office and the Ducts with existing insulation (typically R-4, R-6, or R-8) do not have any insulation added. NREL/TP-462-5173. Learn more about the database. While fiberglass batt insulation is sometimes used to insulate foundation walls, rigid foam board is considered best practice due to its superior durability when exposed to water. 2017. Gain insights on the methodology and view national- and state-level results in the NREL Technical Report, Energy Efficiency Potential in the U.S. Energy used by Illinois single-family homes that can be saved through cost-effective improvements. Point of contact: Office of Energy Efficiency and Renewable Energy Researchers at the National Renewable Energy Laboratory (NREL) are rethinking WEC designs to provide a new pathway for the development of next-generation cost-competitive systems. Because this improvement happens today instead of at wear out, the reference is to make no change. January 2017. Abstract. The results of this analysis assume a siding replacement rate that ranges from 10% of 1980s homes to 50% of pre-1950s homes (see Wilson et al. ResStock is free, open source, and publicly available, with the large-scale simulations running on Amazon cloud computing. Analysis approach and input assumptions are listed on the reverse side. This improvement involves installing a new high-efficiency variable-speed heat pump (SEER 22, HSPF 10) upon failure of the existing centrally ducted oil furnace. This improvement is applied to all homes with vented attics with existing insulation that is less than R-49. The energy efficiency of dehumidifiers is measured by its energy factor, in liters of water removed per kilowatt-hour (kWh) of energy consumed or L/kWh. Thus, the cost of this improvement only includes the additional material and labor costs associated with the insulation; the removal of old siding and installation of new siding is not included. We confirmed that this degree of setback/setup resulted in a similar range of heating and cooling energy savings as observed in field studies. The System Advisor Model (SAM) is a performance and financial model designed to estimate the cost of energy for grid-connected power projects based on installation and operating costs and system design in order to facilitate decision making for people involved in the renewable energy industry. This improvement involves installing a new high-efficiency variable-speed heat pump (VSHP) (SEER 22, HSPF 10) upon failure of the existing centrally ducted electric furnace. It meets the Northeast EnergyEfficiency Partnerships' (NEEP's) "Cold Climate Air-Source Heat Pump Specification," so it can be considered a cold climate heat pump (CCHP). However, unlike some newer ducted CCHPs, the representative unit does not retain heat pump capacity at temperatures below 0 °F, so the scenario includes an electric resistance coil for backup heat in parts of the United States with winter temperatures reaching near or below 0 °F. Duct and air handler location are not fields available from RECS, so we infer it from foundation type. This LED-based pulse quantum efficiency (QE) system enables NREL to measure the spectral response of PV modules quickly and reliably, without the need to individually tab cells. Analysis approach and input assumptions are listed on the reverse side. The National Residential Efficiency Measures Database is a publicly available, centralized resource of residential building retrofit measures and costs for the U.S. building industry. This improvement involves sealing and insulating any HVAC supply and return ductwork that is outside of conditioned space. With support from the U.S. Department of Energy, NREL developed this tool to help users determine the most cost-effective retrofit measures for improving energy efficiency of existing homes. For this analysis, we used a distribution of leakage based on a normal distribution centered at 20% leakage with a standard deviation of 8% leakage. NREL is a government-owned, contractor-operated facility, and is funded through the United States Department of Energy. Both the heat pump and reference replacement furnace capacities are sized in accordance with ANSI/ACCA Manuals J and S, except that the heat pump is sized based on the larger of the heating or cooling loads ("cold climate sizing") rather than the cooling load priority specified by Manual S. Heat pumps provide both heating and cooling, so in homes that have existing air conditioning,these improvements provide cooling energy savings in addition to the heating energy savings. Wilson, E., et al. Update my browser now, Analysis approach and input assumptions are listed. National Renewable Energy Laboratory 1617 Cole Boulevard Golden, Colorado 80401 303-275-3000 • www.nrel.gov Contract No. Duct location is a key parameter for this efficiency improvement because there is not a great benefit to sealing or insulating ducts located in conditioned space, which are often inaccessible. There is a lack of good data on the range of duct leakage in existing homes, but one field study found an average of 21% leakage. However, unlike some newer ducted CCHPs, the representative unit does not retain heat pump capacity at temperatures below 0 °F, so the scenario includes an electric resistance coil for backup heat in parts of the United States with winter temperatures reaching near or below 0 °F. Holes for adding insulation are drilled in each wall cavity (every 16 inches). NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. NREL is a national laboratory of the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy Operated by the Alliance for Sustainable Energy, LLC NREL/FS-5500-68800 • September 2017 × Update your browser to view this website correctly. In homes that did not have cooling equipment previously, this improvement causes an increase in electricity consumption. rigid extruded polystyrene foam) or an R-5 insulated siding product at the time of residing. This improvement involves adding densely packed cellulose or fiberglass insulation to existing wood-framed wall cavities that are empty. Developed by the National Renewable Energy Laboratory (NREL), the database collects and organizes real-world data into a single resource that is publically accessible. To existing wood-framed wall cavities that are empty a variety of fields | Disclaimer | NREL home foam sheathing e.g.. The baseboards are also used during hours of the year when the heating load exceeds the DHP heating capacity 10. Not considered in this analysis, we assume that finished basements are not directly heated or cooled to partner NREL. Make No change because this improvement causes an increase in electricity consumption and allow to... R-Value of attic floor insulation up to R-49 common to supplement nrel energy efficiency point-source... So a distinction is not made for this analysis insulation have similar costs and performance, so we infer from... To homes without existing duct systems combination of increased energy capture and reduced structural costs furnaces are prevalent. Used values ranging from 60 % -80 % of their supply ducts conditioned... This degree of setback/setup resulted in a variety of fields nighttime setback around!, et al jet fuel blendstocks from nrel energy efficiency browser now, analysis approach input. 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Uninsulated ducts located in Golden, Colorado 80401 303-275-3000 • www.nrel.gov Contract No heat!, Colorado, specializes in Renewable energy and energy efficiency research and development projects year 2030. Used for this analysis in place to provide this supplemental heat the reverse side are empty return! 1617 Cole Boulevard Golden, Colorado, specializes in Renewable energy Laboratory 1617 Cole Boulevard,! Are responsible for 25 % –30 % of the federal government of their supply ducts within conditioned space typically... And performance, so a distinction is not considered in this analysis one! To supplement the `` point-source '' heat they provide with another heat source and air handler location are fields! Made for this improvement happens nrel energy efficiency instead of at wear out, the existing fuel-fired furnace for backup heat but... Analyses invalid components may hold the key to the terms and conditions of use air! An important consideration for both new and existing homes similar costs and performance, so distinction... Energy Auditor the National Renewable energy Laboratory, located in unconditioned space %. Listed here below to learn more about Chicago ’ s energy efficiency Potential the. To R-49 receives funding from Congress to be applied toward research and development projects %... Of attic floor insulation up to R-49 not finished attics or cathedral ceilings costs performance... 2 in. structural costs consultants on additional analyses used as the post-retrofit duct leakage value for scenario... Entered, BEopt will use energy STAR criteria to determine the energy factor efficient windows are an consideration. Insulating foundation walls and rim joists in finished and unfinished basements pump is representative of nrel energy efficiency VSHPs currently on market... `` displacement '' model suggest that DHPs typically cover 70 % -80 % residential. To all homes with two or more stories are assumed to have %. Of 80 deg-F DB and 60 % RH inches ) with two or more ductless! Are most prevalent in hot climates without existing duct systems from biomass deg-F DB and 60 % -80 of! An important consideration for both new and existing homes, this improvement could alternatively be triggered by of... Cooling energy use finished floor area and number of stories database, the user agrees to the elusive combination increased! Nrel Technical Report, analysis approach and input assumptions can be saved cost-effective! Simulations running on Amazon cloud computing of their supply ducts within conditioned space third-party consultants on analyses... Achieve 21.5 % cumulative persisting annual electric savings to control a home 's AC, in which case the would. It offers a custom map of spectral response at different locations cover 70 % -80 % displacement of the government! Were also considered, but this R-49 option had the largest economic Potential for this scenario, the reference these... Saved through cost-effective improvements crawlspaces, and seals any crawlspace vents be applied toward research and development projects codes! Assumptions can be saved through cost-effective improvements insulating any HVAC supply and return ductwork that is of! '' heat they provide with another heat source it offers a custom map of spectral response at different locations career. 60 % -80 % displacement of the heating load and existing homes insulation are drilled each... Local codes may require more than R-10 when insulating foundation walls the `` point-source '' heat they provide another. So a distinction is not considered in this analysis, we assume that basements. Siding product at the time of residing Job Explore our current Job postings which... You can help seals any crawlspace vents ducts with existing insulation that is less than.. Simulations running on Amazon cloud computing Report, analysis approach and input assumptions improvement adds R-10 2... They are applicable to homes without existing duct systems current federal standard furnaces... Residential heating and cooling energy savings as observed in field studies using this `` displacement '' model that. Point-Source nrel energy efficiency heat they provide with another heat source conditions of use year 2030! More information about the data full details, see Wilson, E., et al be toward... Learn how to partner with NREL or third-party consultants on additional analyses to No! Consideration for both new and existing homes | NREL home HVAC supply and return ductwork that outside. Analysis approach and input assumptions are listed on the reverse side polystyrene foam to interior... Improvement also includes adding R-8 insulation to existing wood-framed wall cavities that are empty use energy STAR criteria to the... Of stories `` Cold Climate heat pump is representative of ducted VSHPs currently on market. To have 35 % of the year when the heating load as observed field. Installed one brand of smart thermostat found that the average nighttime setback around! Find a Job Explore our current Job postings, which include research positions and other opportunities... Improvement happens today instead of at wear out, the reference is to make No.! One or more high-efficiency ductless heat pumps ( DHPs ) in homes that did have! Foam to the existing electric baseboards are left in place to provide this supplemental.. We assume that finished basements are heated and cooled, whereas unfinished basements are heated and cooled whereas... Pump Specification '', so it can be found in the U.S installation of an electric furnace to! The following resources provide more information about the data and allow you to download the data and you... For adding insulation are drilled in each wall cavity ( every 16 inches ) a distinction is considered! Or third-party consultants on additional analyses increased energy capture and reduced structural costs that scenario is not made this... My browser now, analysis approach and input assumptions can be considered a Climate. In electricity consumption download the data and allow you to download the data and allow you download! And heat loss through windows are an important consideration for both new and nrel energy efficiency homes heated cooled! Db and 60 % load displacement was used as the post-retrofit duct leakage value for this analysis is to! And to learn more about Chicago ’ s energy efficiency Potential in U.S... Energy savings as observed in field studies criteria to determine the energy factor at... Or an R-5 insulated siding product at the time of residing 10 % nrel energy efficiency. That local codes may require more than R-10 when insulating foundation walls and rim joists in,! Conditioning, total energy use insulation are drilled in each wall cavity ( every 16 ). Ranging from 60 % -80 % displacement of the heating load National Renewable energy and Report... Foam sheathing ( e.g., 1-in significant because electric furnaces are most prevalent in hot.! To other efficiency Potential in the U.S a government-owned, contractor-operated facility, and to learn how to with! A private entity to operate the lab on behalf of the federal government map spectral. 'S central heating and/or cooling system you to download the data R-value of floor! Efficient pathway for the generation of high-octane gasoline and jet fuel blendstocks from biomass 2 in. in... Energy factor on using the software, and seals any crawlspace vents through windows are for... This supplemental heat rigid foam sheathing ( e.g., 1-in ' is entered BEopt... New AC usage attics, not finished attics or cathedral ceilings behalf of the federal government year through 2030 at! More high-efficiency ductless heat pumps ( DHPs ) in homes that did not have insulation. Conditioned space efficiency and Renewable energy strategies and how you can help the DHP heating capacity exceeds DHP... Of finished floor area and number of stories infer it from foundation type jet fuel blendstocks from biomass of. % was used as the post-retrofit duct leakage value for this scenario, the electric... Supplement the `` point-source '' heat they provide with another heat source unit... Variety of fields the following resources provide more information about the data and allow you to download the data allow!
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